Radiant energy – Radiation controlling means – Shields
Patent
1974-04-24
1976-03-02
Borchelt, Archie R.
Radiant energy
Radiation controlling means
Shields
138157, A61N 510, G21F 504, G21K 104
Patent
active
039420191
ABSTRACT:
An electron collimator is formed by two pairs of multi-leaved corner plates which are capable of simultaneous movement to alter the dimension of the collimator in two dimensions.
In a preferred embodiment each corner shaped plate has two leaves which interleave with the leaves of an adjoining corner plate.
REFERENCES:
patent: 1212948 (1917-01-01), Hesse
patent: 2049184 (1936-07-01), Walsleben
patent: 2675486 (1954-04-01), Green et al.
patent: 2840257 (1958-06-01), Zeni
Claridge Geoffrey Maximilian Lawrence
Driver Brian Sydney
Jarvis Timothy Robert
Borchelt Archie R.
Grigsby T. N.
Nigohosian Leon
Trifari Frank R.
U. S. Philips Corporation
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